{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:K4D23L5VITFG7LP7GQ4YVCYWMC","short_pith_number":"pith:K4D23L5V","canonical_record":{"source":{"id":"1904.03096","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2019-04-05T14:48:10Z","cross_cats_sorted":[],"title_canon_sha256":"a6dba20605869f04985416052db4fd2c047a6a3ca4ce005ae8539bb87dc8b8da","abstract_canon_sha256":"6799f20a4e3b0453aeddfcbac4e8b354d7249dfbae383715b9dad1fd692afcd7"},"schema_version":"1.0"},"canonical_sha256":"5707adafb544ca6fadff34398a8b166097bb1bb89cf547b4510cf2b671244d50","source":{"kind":"arxiv","id":"1904.03096","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.03096","created_at":"2026-05-17T23:49:18Z"},{"alias_kind":"arxiv_version","alias_value":"1904.03096v1","created_at":"2026-05-17T23:49:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.03096","created_at":"2026-05-17T23:49:18Z"},{"alias_kind":"pith_short_12","alias_value":"K4D23L5VITFG","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"K4D23L5VITFG7LP7","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"K4D23L5V","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:K4D23L5VITFG7LP7GQ4YVCYWMC","target":"record","payload":{"canonical_record":{"source":{"id":"1904.03096","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2019-04-05T14:48:10Z","cross_cats_sorted":[],"title_canon_sha256":"a6dba20605869f04985416052db4fd2c047a6a3ca4ce005ae8539bb87dc8b8da","abstract_canon_sha256":"6799f20a4e3b0453aeddfcbac4e8b354d7249dfbae383715b9dad1fd692afcd7"},"schema_version":"1.0"},"canonical_sha256":"5707adafb544ca6fadff34398a8b166097bb1bb89cf547b4510cf2b671244d50","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:18.595836Z","signature_b64":"RWhl72DhGDgApAmZ3Ty8GhUoCpGrV1780AScHC3OSIZNdljZXQTVUtlUMfCdrPY4CIFUf18+vnDT3cyDZ6IvAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5707adafb544ca6fadff34398a8b166097bb1bb89cf547b4510cf2b671244d50","last_reissued_at":"2026-05-17T23:49:18.595354Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:18.595354Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.03096","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:49:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AzJhY4UrPeKwtOmqN2SUHn9GKSH6UHyYdy7BqXr12Jyd5+GGV6egIR141U/hIspQ4KL3RBkrKE5svMb65HHTBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T04:44:45.867618Z"},"content_sha256":"3efd205b4cf1a3fb351a68687866cbf61e6bf115adb238755435f00d9e64714f","schema_version":"1.0","event_id":"sha256:3efd205b4cf1a3fb351a68687866cbf61e6bf115adb238755435f00d9e64714f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:K4D23L5VITFG7LP7GQ4YVCYWMC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Surface Integral Formulation for Scattering Modeling by 2D Penetrable Objects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CE","authors_text":"Donglin Su, Shunchuan Yang, Xiaochao Zhou","submitted_at":"2019-04-05T14:48:10Z","abstract_excerpt":"In this paper, we proposed a single-source surface integral formulation to accurately solve the scattering problems by 2D penetrable objects. In this method, the objects are replaced by their surrounding medium through enforcing a surface equivalent electric current to ensure fields exactly the same as those in the original scattering problem. The equivalent electric current is obtained through emitting the equivalent magnetic current by enforcing that the electric fields in the original and equivalent problems equal to each other. Through solving the Helmholtz equation inside objects by the s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.03096","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:49:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vDlCWo4mvY9yPxd8mw9nhIvRPBkaIhS4+pQn5WhPcbmHOrgQhF4E4jKRueO9wTY8CtpVXf+DV7v7DFEuJZAhBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T04:44:45.867974Z"},"content_sha256":"425ed56dfbe389525e39ada85b263dd4a3633efaf3e99ffb752544c131089b45","schema_version":"1.0","event_id":"sha256:425ed56dfbe389525e39ada85b263dd4a3633efaf3e99ffb752544c131089b45"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K4D23L5VITFG7LP7GQ4YVCYWMC/bundle.json","state_url":"https://pith.science/pith/K4D23L5VITFG7LP7GQ4YVCYWMC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K4D23L5VITFG7LP7GQ4YVCYWMC/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-01T04:44:45Z","links":{"resolver":"https://pith.science/pith/K4D23L5VITFG7LP7GQ4YVCYWMC","bundle":"https://pith.science/pith/K4D23L5VITFG7LP7GQ4YVCYWMC/bundle.json","state":"https://pith.science/pith/K4D23L5VITFG7LP7GQ4YVCYWMC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K4D23L5VITFG7LP7GQ4YVCYWMC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:K4D23L5VITFG7LP7GQ4YVCYWMC","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"6799f20a4e3b0453aeddfcbac4e8b354d7249dfbae383715b9dad1fd692afcd7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2019-04-05T14:48:10Z","title_canon_sha256":"a6dba20605869f04985416052db4fd2c047a6a3ca4ce005ae8539bb87dc8b8da"},"schema_version":"1.0","source":{"id":"1904.03096","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.03096","created_at":"2026-05-17T23:49:18Z"},{"alias_kind":"arxiv_version","alias_value":"1904.03096v1","created_at":"2026-05-17T23:49:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.03096","created_at":"2026-05-17T23:49:18Z"},{"alias_kind":"pith_short_12","alias_value":"K4D23L5VITFG","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"K4D23L5VITFG7LP7","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"K4D23L5V","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:425ed56dfbe389525e39ada85b263dd4a3633efaf3e99ffb752544c131089b45","target":"graph","created_at":"2026-05-17T23:49:18Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"In this paper, we proposed a single-source surface integral formulation to accurately solve the scattering problems by 2D penetrable objects. In this method, the objects are replaced by their surrounding medium through enforcing a surface equivalent electric current to ensure fields exactly the same as those in the original scattering problem. The equivalent electric current is obtained through emitting the equivalent magnetic current by enforcing that the electric fields in the original and equivalent problems equal to each other. Through solving the Helmholtz equation inside objects by the s","authors_text":"Donglin Su, Shunchuan Yang, Xiaochao Zhou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2019-04-05T14:48:10Z","title":"A Surface Integral Formulation for Scattering Modeling by 2D Penetrable Objects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.03096","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:3efd205b4cf1a3fb351a68687866cbf61e6bf115adb238755435f00d9e64714f","target":"record","created_at":"2026-05-17T23:49:18Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"6799f20a4e3b0453aeddfcbac4e8b354d7249dfbae383715b9dad1fd692afcd7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2019-04-05T14:48:10Z","title_canon_sha256":"a6dba20605869f04985416052db4fd2c047a6a3ca4ce005ae8539bb87dc8b8da"},"schema_version":"1.0","source":{"id":"1904.03096","kind":"arxiv","version":1}},"canonical_sha256":"5707adafb544ca6fadff34398a8b166097bb1bb89cf547b4510cf2b671244d50","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5707adafb544ca6fadff34398a8b166097bb1bb89cf547b4510cf2b671244d50","first_computed_at":"2026-05-17T23:49:18.595354Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:18.595354Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RWhl72DhGDgApAmZ3Ty8GhUoCpGrV1780AScHC3OSIZNdljZXQTVUtlUMfCdrPY4CIFUf18+vnDT3cyDZ6IvAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:18.595836Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.03096","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3efd205b4cf1a3fb351a68687866cbf61e6bf115adb238755435f00d9e64714f","sha256:425ed56dfbe389525e39ada85b263dd4a3633efaf3e99ffb752544c131089b45"],"state_sha256":"3608e58a120328629ba791335e68f419ad52d406c06669654537d61d06c21753"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oH0DqM0slfYcxGa6SfQyKHUNkrzY62CEyTK9qrHZTuznsA0nQ3427dLAqBTpmcbTX7XZSdyEbqgAjnRrspK5Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T04:44:45.870047Z","bundle_sha256":"22f409a9e10061003866509c2239d4feb4fbefb608ea3de31242e43e25e1e5bf"}}